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authorJiri Kosina <jkosina@suse.cz>2012-05-18 13:50:28 +0200
committerJiri Kosina <jkosina@suse.cz>2012-05-18 15:19:11 +0200
commitbfa10b8c98bb335bc3e401d3ec947d446f04d1aa (patch)
tree70c1ace62544811e7f4f39f8bab8b85ee9f89017 /MAINTAINERS
parent070ad7e793dc6ff753ee682ef7790b3373b471f6 (diff)
downloadlinux-bfa10b8c98bb335bc3e401d3ec947d446f04d1aa.tar.gz
floppy: remove floppy-specific O_EXCL handling
Block layer now handles O_EXCL in a generic way for block devices. The semantics is however different for floppy and all other block devices, as floppy driver contains its own O_EXCL handling. The semantics for all-but-floppy bdevs is "there can be at most one O_EXCL open of this file", while for floppy bdev the semantics is "if someone has the bdev open with O_EXCL, noone else can open it". There is actual userspace-observable change in behavior because of this since commit e525fd89d380c ("block: make blkdev_get/put() handle exclusive access") -- on kernels containing this commit, mount of /dev/fd0 causes the fd0 block device be claimed with _EXCL, preventing subsequent open(/dev/fd0). Bring things back into shape, i.e. make it possible, analogically to other block devices, to mount the floppy and open() it afterwards -- remove the floppy-specific handling and let the generic bdev code O_EXCL handling take over. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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